RECRUITING

Yeast Mannans and Stool Frequency

Study Overview

This clinical trial focuses on testing the efficacy of different digital interventions to promote re-engagement in cancer-related long-term follow-up care for adolescent and young adult (AYA) survivors of childhood cancer.

Description

Findings from an open-label pilot study of 20 adults suggested that supplementation with 15 g/day of yeast mannans was highly tolerable and demonstrated specific modulation of the microbiota and increased stool frequency in a subset of subjects reporting ≤1 stool per day at baseline. The primary aim of this randomized, double-blind, controlled trial is to determine if yeast mannan supplementation at 12 g/day will increase stool frequency in generally healthy adults reporting ≤1 stool per day. Secondary aims will determine the effect of yeast mannans on intestinal transit time, gastrointestinal symptoms, fecal microbiota composition, and urinary and fecal metabolomics.

Official Title

Efficacy of Yeast Mannan Supplementation on Increasing Stool Frequency in Generally Healthy Adults: A Randomized Controlled Trial

Quick Facts

Study Start:2025-07-17
Study Completion:2026-06-30
Study Type:Not specified
Phase:Not Applicable
Enrollment:Not specified
Status:RECRUITING

Study ID

NCT06911177

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Ages Eligible for Study:18 Years to 90 Years
Sexes Eligible for Study:ALL
Accepts Healthy Volunteers:Yes
Standard Ages:ADULT, OLDER_ADULT
Inclusion CriteriaExclusion Criteria
  1. * Adults who report a stool frequency of ≤ 1 per day.
  2. * Able to provide written informed consent in English.
  3. * Willingness to consume 1 supplement (12 g of yeast mannans or control) daily for 28 days.
  4. * Willingness to maintain their usual diet and physical activity patterns throughout the study and refrain from the consumption of any yeast-based foods (e.g. Marmite or Vegemite) or yeast extract supplements.
  5. * Willing to comply with study procedures, including stool and urine colle
  1. * Stool frequency of \< 3 per week
  2. * Yeast allergy
  3. * Vegan dietary pattern
  4. * Self-reported kidney disease
  5. * Elite athletes or long-distance runners
  6. * Use of antibiotic drugs within 1 month of screening
  7. * Current use of laxatives or antidiarrheal medications
  8. * Use of other investigational products within 3 months of the screening
  9. * Previously or currently being treated for intestinal diseases or conditions, including irritable bowel disease (i.e., IBS-D or IBS-mixed), Crohn's disease, ulcerative colitis, celiac disease, or gastrointestinal cancer.
  10. * Previous gastrointestinal surgery (e.g., gastric bypass, fundoplication, bowel resection).
  11. * Current cancer treatment.
  12. * Currently pregnant.

Contacts and Locations

Study Contact

Wendy J Dahl, PhD
CONTACT
352-294-3707
wdahl@ufl.edu

Study Locations (Sites)

Department of Food Science and Human Nutrition
Gainesville, Florida, 32611
United States

Collaborators and Investigators

Sponsor: University of Florida

Study Record Dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Registration Dates

Study Start Date2025-07-17
Study Completion Date2026-06-30

Study Record Updates

Study Start Date2025-07-17
Study Completion Date2026-06-30

Terms related to this study

Keywords Provided by Researchers

  • yeast mannan
  • stool frequency
  • transit time
  • microbiota

Additional Relevant MeSH Terms

  • Defecation Frequency